Company lists · Data refreshed September 2026
Top 25 Contact center optimization companies worldwide
RevenueBase identified 6,387 contact center optimization companies worldwide as of September 2026 and tracks 388,377 professional contacts across them, including 42,479 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers contact center optimization companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for contact center optimization companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest contact center optimization companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 30,990 contacts → | ||||
Indirect evidence “Foundever® is the next-generation service leader reinventing customer experience (CX).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 20,095 contacts → | ||||
Indirect evidence “A AeC é apontada consistentemente como a líder brasileira na entrega de soluções de experiência do cliente e gestão de processos terceirizados.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 17,310 contacts → | ||||
Indirect evidence “iQor is a trusted partner in customer experience solutions for global brands and a portfolio company of Mill Point Capital.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 14,976 contacts → | ||||
Indirect evidence “A global customer experience (CX) management solutions provider, Startek® delivers best-in-class omnichannel CX, digital transformation and enterprise tech services for leading…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 7,034 contacts → | ||||
Indirect evidence “Freshworks Inc.(NASDAQ: FRSH) is the AI-powered, unified service operations platform that is fast to deploy, intuitive to use, and enables every employee to be more productive.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 6,167 contacts → | ||||
Indirect evidence “Bir Turkcell grup şirketi olarak yılında kurulduğumuzda amacımız hep eşsiz bir müşteri deneyimi yaşatmaktı.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 5,553 contacts → | ||||
Strong evidence “When people reach for their phones, use laptops, or grab their tablets, Afni's contact center teams are there to provide prompt and friendly help.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 4,785 contacts → | ||||
Indirect evidence “At Fusion CX, we revolutionize customer experience by blending innovative technology and human connection.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 4,561 contacts → | ||||
Strong evidence “CCSI specializes in high‑performance, cost‑efficient contact center solutions supported by a world‑class bilingual workforce and state‑of‑the‑art infrastructure in Mexico.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 4,342 contacts → | ||||
Strong evidence “With a fresh name and decades of contact center expertise, we’re dedicated to collaborative partnerships, understanding your unique needs, and tailoring solutions for an enhanced…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4,161 contacts → | ||||
Indirect evidence “ibex.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 4,126 contacts → | ||||
Partial evidence “Mais que call center: soluções que transformam o seu negócio e a jornada dos clientes!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 3,914 contacts → | ||||
Strong evidence “Vikstar is one of the biggest contact centers of Brazil.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3,785 contacts → | ||||
Strong evidence “Founded in 1993, since the beginning Sercom has stood out in the Contact Center Services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3,333 contacts → | ||||
Strong evidence “A TMKT é uma empresa de Contact Center que foi fundada em 1991 e se tornou uma referência no mercado de Customer Experience (CX).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3,122 contacts → | ||||
Partial evidence “Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3,071 contacts → | ||||
Strong evidence “Extensya is a company that primarily specializes in contact management solutions and business process outsourcing services, with a network of fully equipped contact centers in…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3,061 contacts → | ||||
Strong evidence “ePerformax is a high-performing contact center & BPO that provides world-class, omnichannel service and support to a select group of Fortune companies and their customers.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2,951 contacts → | ||||
Indirect evidence “A VGX, é uma empresa 100% brasileira, com 13 anos de atuação e mais de 5.100 colaboradores, consolidada como referência em soluções de Customer Experience,Cobrança, Atendimento…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2,774 contacts → | ||||
Partial evidence “Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2,552 contacts → | ||||
Indirect evidence “Com 19 anos de experiência em CX e BPO, somos consultivos e entregamos soluções personalizadas que conectam pessoas e tecnologia para impulsionar seus resultados.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2,342 contacts → | ||||
Strong evidence “Más que un contact center y BPO, somos el partner que asegura que la experiencia de tus clientes sea increíble.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2,221 contacts → | ||||
Strong evidence “Somos la compañía líder en Servicios Next Gen de Contact Center, Business Process Outsourcing (BPO) y Customer Experience (CX).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,990 contacts → | ||||
Indirect evidence “Sitel Philippines (formerly SYKES).” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1,987 contacts → | ||||
Indirect evidence “transcosmos launched its operations in 1966.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: contact center optimization companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names contact center optimization companies.
- Partial evidence
- Its own public description names part of contact center optimization companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name contact center optimization companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 6,387 contact center optimization companies worldwide
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Contact center optimization companies worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among contact center optimization companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for contact center optimization companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “contact center optimization companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names contact center optimization companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among contact center optimization companies, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 42,479 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Contact center optimization companies by location
33 lists · largest firstEvery Contact center optimization companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Contact center optimization companies based in the United States1,216
- Contact center optimization companies based in India370
- Contact center optimization companies based in Brazil281
- Contact center optimization companies based in the United Kingdom259
- Contact center optimization companies based in the Philippines164
- Contact center optimization companies based in Canada156
- Contact center optimization companies based in Mexico146
- Contact center optimization companies based in Italy136
- Contact center optimization companies based in Germany134
- Contact center optimization companies based in Spain132
- Contact center optimization companies based in France106
- Contact center optimization companies based in the Netherlands106
- Contact center optimization companies based in Colombia91
- Contact center optimization companies based in Argentina85
- Contact center optimization companies based in South Africa85
- Contact center optimization companies based in Türkiye78
- Contact center optimization companies based in Australia73
- Contact center optimization companies based in Egypt63
- Contact center optimization companies based in Poland63
- Contact center optimization companies based in Chile44
- Contact center optimization companies based in Israel38
- Contact center optimization companies based in Tunisia36
- Contact center optimization companies based in Belgium30
- Contact center optimization companies based in Ecuador29
- Contact center optimization companies based in Portugal28
- Contact center optimization companies based in Greece26
Cities
- Contact center optimization companies based in Sao Paulo, Brazil95
- Contact center optimization companies based in London, United Kingdom60
- Contact center optimization companies based in Madrid, Spain41
- Contact center optimization companies based in Toronto, Canada30
- Contact center optimization companies based in Atlanta, United States27
- Contact center optimization companies based in Paris, France27
- Contact center optimization companies based in Miami, United States26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names contact center optimization companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many contact center optimization companies are there worldwide?
RevenueBase identified 6,387 contact center optimization companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Foundever, headquartered in Miami, tops this list with the largest team on record.
Which country has the most contact center optimization companies?
The United States leads with 1,216 companies, followed by India (370) and Brazil (281). Every contact center optimization companies list by country and city is linked on this page.
Which city has the most contact center optimization companies?
Sao Paulo leads with 95 headquartered companies, followed by Lahore (63) and London (63).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 42,479 verified decision-maker contacts tracked across these 6,387 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.